Preheat the oven to 350°. Line two baking sheets with parchment paper and set aside.

Whisk the flour, baking powder and salt together and set aside.

Combine the butter, peanut butter, brown sugar and sugar in large bowl. Beat until light and creamy, about 3 minutes, scraping the bowl down as needed. Add the egg and vanilla and mix well. Blend in the dry ingredients.

Flatten 2 teaspoons of dough in the palm of one hand. Place a Reese's mini peanut butter cup in the center of the dough. Wrap the edges around the peanut butter cup. You may have to maneuver the dough to go over the top.

Bake in a 350° oven for 14 minutes, rotating the pans top to bottom and front to back halfway through. Let the cookies cool on the baking sheets.

For the topping:

Place the melted butter into a quart size plastic freezer bag. Seal and cut a small corner off the end that does not zip. Squeeze the chocolate over the cookies in a decorative pattern.

Recipe by Desserts Required at https://www.dessertsrequired.com/peanut-butter-surprise-cookies